Hot-water heating apparatus



(No Model.) I

J. M.THA-YER. HOT WATER HEATING APPARATUS.

Patented Jul 21,1891.-

UNITED STATES PATENT OFFICE.

JAMES M. TI-IAYER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TOTHE TI-IA'YERHEATER COMPANY, OF PORTLAND, MAINE.

HOT-WATER H EATl NG APPARATUS.

SPECIFICATION forming part of Letters Patent N 0. 456,328, dated July21, 1891.

Application filed October 2, 1890. Serial No. 366,821. (No model.)

T at whom, it may concern:

Be it known that I, JAMES M. THAYER, of Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Hot-IVater HeatingApparatus, of which the following description, in connection with theaccompanyingdrawings, is aspecification,like letters and figures on thedrawings representing like parts.

to This invention has for its object to provide a hot-water heatingapparatussuch, for instance, as shown in the United States Patent No.378,633, dated February 28, 1888with suitable means for heating thereturn-water I 5 just before it enters the boiler, and also toaccomplish such result economically by placing such means in thecombustion-chamber.

In carrying out this invention a water-top, preferably made convex, isplaced in the outer 2o combustion-chamber, and preferably forming thetop side wall thereof. The return-circulation pipes are arranged toenter the said water-top at the bottom, and pipes lead from saidwater-top to the bottom of the boiler, so that the water returning tothe boiler passes through this water-top.

Figure 1 shows in vertical section a hot-wafor heating apparatusembodying this invention; Fig. 2, a plan view of the water-top; Fig. 03, a sectional detail of the water-top shownin Fig. 2, taken on thedotted lines so 00,- and Fig. 4, a partial side elevation of the heatingapparatus shown in Fig. 1.

The boiler a is of any usual or suitable con- 3 5 struct-ion, having thedistributor b, substantially as shown in the patent referred to.

The boiler a is circular and forms within it a combustion-chamber c, andsaid boiler is placed in a casing or frame-work cl. The pro- 0 ducts ofcombustion pass through the opening 6 into the interior of the casingorframe (Z, which forms an outer combustion-chamber, and pass out ofthesaid chamber throughthe flue-pipe f. A water-topg is placed in the outercombustion-chamber, 'it being herein represented as forming the top sidewall of said chamber and also as being convex and annular. The water-topis substantially circular in shape and has a peripheral flange g, whichrests upon the side walls of the frame or casing d, and has also aflange g at its opencenter, which rests on a flange g of the boiler. Thewater-top g preferably has a plurality of inlets, four, as 2 3 4, 5,being herein shown, and also a plurality of outlets, four, as 6 7 8 9,being herein shown.

Circulation-pipes, as 2', lead from the top of the boiler a as fl'OIllthe distributer b, for instance-and return by return-pipes c" to thebottom of the water-top g.

A pipe or pipes, as F, lead from the top of the water-top g to the lowerpart of the boiler a, four such connecting-pipes 1' being hereinemployed.

The water passing out the distributor b throughthecirculationpipes'ireturnsthrough the'pipes t" to the lower part ofthe Water-top g and thence through the connecting-pipes i to'the lowerpart of the boiler a, so that the water passing out of the boiler andreturning 7: passes through the water-top just prior to entering theboiler.

I do not desire tolimit myself to the number of pipes leading to or fromthe water-top.

I claiin- 7 5 1. Ina hot-water heatingapparatus, a boiler,

a combustion-chamber within it, an outer'casing,as (Z, and an outercombustion-chamber arranged between the outer casing and boiler,combined with an annular water-top placed above and closing the top ofthe outer coinbustion-charnber and heated therefrom, circulation-pipesleading from the boiler and returning to the water-top, and a pipeleading from the water-top to the boiler, substantially as described.

2. In ahot-water heating apparatus,a boiler,

a combustion-chamber within it, an outer casing, as d, and acombustion-chamber between the outer casing and boiler, combined with a0 Water-top forming the top of the outer combustion-chamber,.andcirculation-pipes leading from the boiler and returning to the saidwater-top, and pipes connecting the water-top with the lower end of theboiler, substantially 5 as described.

3. In aThot-water heating apparatus, a boiler, a combustion-chamberwithin it, an outer casi'ng,.as d, and a combustion-chamber between theouter casing and boiler, combined with a convex water-top forming thetop of the outer combustion-chamber, circulation-pipes lead ing' fromthe boiler and returning to the W21. pipe leading from the top of thewater-top ter-top, and a pipe connecting the water-t0p and entering theboiler at its lower end, subwith the lewerpartof theboiler,substantially stantiztlly as described. is described. Intestimony whereof I have signed my 5 Inahot-waterheatinga-pparatus,aboiler, name to this specification in the presence of15 a combustion-chamber withinit, an outer eastwo subscribing witnesses.

ing, as cl, and it combustion-chamberbetween JAMES M. THAYER. it and theboiler, combined with a, Water-top, Witnesses: circulatiompipes leadingfrom the boiler and :lERNIOE .l. NOYES,

m entering the Water-top at the bottom, and a, EDITH F. GUILD.

